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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/sq/MeasurementFactory.java @ 3289:ec9aab93f292

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SQ: First peek into fetching relevant data from SedDB flys-artifacts/trunk@4957 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 12 Jul 2012 16:15:30 +0000
parents
children 36f3b53d5cfc
rev   line source
3289
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package de.intevation.flys.artifacts.model.sq;
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2
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3 import de.intevation.flys.artifacts.model.DateRange;
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4
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5 import de.intevation.flys.backend.SedDBSessionHolder;
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6
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7 import java.util.HashMap;
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8 import java.util.List;
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9 import java.util.Map;
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10
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11 import org.apache.log4j.Logger;
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12
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13 import org.hibernate.SQLQuery;
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14 import org.hibernate.Session;
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15
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16 import org.hibernate.transform.BasicTransformerAdapter;
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18 import org.hibernate.type.StandardBasicTypes;
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19
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20 public class MeasurementFactory
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21 {
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22 private static final Logger log =
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23 Logger.getLogger(MeasurementFactory.class);
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24
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25 public static final String SQL_MEASSURE =
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26 "SELECT " +
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27 "m.TSAND AS TSAND," +
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28 "m.TSCHWEB AS TSCHWEB," +
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29 "m.CSCHWEB AS CSCHWEB " +
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30 /* TODO: Select more */
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31 "FROM messung m " +
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32 "JOIN station s ON m.stationid = s.stationid " +
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33 "JOIN gewaesser g ON s.gewaesserid = g.gewaesserid " +
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34 "WHERE " +
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35 "g.name = :river_name AND " +
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36 "s.km BETWEEN :location - 0.001 AND :location + 0.001 AND " +
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37 "m.datum BETWEEN :from AND :to";
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38
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39 public static final class MeasurementResultTransformer
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40 extends BasicTransformerAdapter
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41 {
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42 public static MeasurementResultTransformer INSTANCE =
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43 new MeasurementResultTransformer();
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44
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45 public MeasurementResultTransformer() {
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46 }
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47
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48 @Override
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49 public Object transformTuple(Object [] tuple, String [] aliases) {
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50 Map<String, Object> map = new HashMap<String, Object>();
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51 for (int i = 0; i < tuple.length; ++i) {
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52 map.put(aliases[i], tuple[i]);
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53 }
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54 return new Measurement(map);
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55 }
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56 } // class BasicTransformerAdapter
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57
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58 private MeasurementFactory() {
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59 }
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60
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61 protected static List<Measurement> load(
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62 Session session,
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63 String river,
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64 double location,
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65 DateRange dateRange
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66 ) {
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67 SQLQuery query = session.createSQLQuery(SQL_MEASSURE)
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68 .addScalar("TSAND", StandardBasicTypes.DOUBLE)
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69 .addScalar("TSCHWEB", StandardBasicTypes.DOUBLE)
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70 .addScalar("CSCHWEB", StandardBasicTypes.DOUBLE);
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71
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72 query.setString("river_name", river);
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73 query.setDouble("location", location);
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74 query.setDate("from", dateRange.getFrom());
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75 query.setDate("to", dateRange.getTo());
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76
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77 query.setResultTransformer(MeasurementResultTransformer.INSTANCE);
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78
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79 return query.list();
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80 }
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81
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82 public static List<Measurement> getMeasurements(
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83 String river,
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84 double location,
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85 DateRange dateRange
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86 ) {
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87 Session session = SedDBSessionHolder.HOLDER.get();
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88 try {
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89 return load(session, river, location, dateRange);
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90 }
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91 finally {
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92 session.close();
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93 }
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94 }
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95 }
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96 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org